公开(公告)号：US10666475B2

公开(公告)日：2020-05-26

申请号：US16173796

申请日：2018-10-29

Applicant: BAE Systems Information and Electronic Systems Integration Inc.

Inventor： William D. Watson ,  Prabahan Basu ,  Jonathan P. Beaudeau ,  David J. Couto

IPC: H04J13/10 ,  H04L27/227 ,  H04L27/20

Abstract: An electronic transmitter includes: a modulator to phase modulate a carrier signal with a baseband signal using a phase modulation sequence; and an emitter to emit the phase modulated signal. The phase modulated signal has poor autocorrelation, has a corresponding mismatched filter based on the phase modulation sequence, and is configured to demodulate into the baseband signal through poor cross-correlation with the mismatched filter. Sometimes, the transmitter is part of a sensing apparatus, where the emitter emits the phase modulated signal at a target and the emitted signal reflects off the target. The sensing apparatus includes a receiver that has a collector to collect the reflected signal, and a demodulator to demodulate the collected signal into the baseband signal through the poor cross-correlation with the mismatched filter. Sometimes, the transmitter is part of a communication system, where the emitter emits the phase modulated signal to an intended recipient.

公开(公告)号：US10581471B1

公开(公告)日：2020-03-03

申请号：US16173672

申请日：2018-10-29

Applicant: BAE Systems Information and Electronic Systems Integration Inc.

Inventor： Jonathan P. Beaudeau ,  Prabahan Basu ,  David J. Couto ,  William D. Watson

IPC: H04B1/04 ,  H04L25/08

Abstract: An electronic transmitter includes: a generator circuit to generate a baseband signal; a modulator circuit to modulate a carrier signal with the baseband signal; an emitter to emit the modulated signal at an intended recipient; and a distortion circuit to apply a final distortion to the baseband signal or the modulated signal. The final distortion is optimized to minimize the ability of unintended recipients to localize the emitter using correlation-based techniques, and to minimize any degradation to the data rate of the emitted signal at the intended recipient. In some cases, the transmitter is part of an electronic communication system that also includes a receiver at the intended recipient. The receiver is aware of the final distortion and includes a collector to collect the emitted signal, and a demodulator circuit to demodulate the collected signal using the final distortion to recover the baseband signal.

公开(公告)号：US20200136870A1

公开(公告)日：2020-04-30

申请号：US16173796

申请日：2018-10-29

Applicant: BAE Systems Information and Electronic Systems Integration Inc.

Inventor： William D. Watson ,  Prabahan Basu ,  Jonathan P. Beaudeau ,  David J. Couto

IPC: H04L27/227 ,  H04L27/20

Abstract: An electronic transmitter includes: a modulator to phase modulate a carrier signal with a baseband signal using a phase modulation sequence; and an emitter to emit the phase modulated signal. The phase modulated signal has poor autocorrelation, has a corresponding mismatched filter based on the phase modulation sequence, and is configured to demodulate into the baseband signal through poor cross-correlation with the mismatched filter. Sometimes, the transmitter is part of a sensing apparatus, where the emitter emits the phase modulated signal at a target and the emitted signal reflects off the target. The sensing apparatus includes a receiver that has a collector to collect the reflected signal, and a demodulator to demodulate the collected signal into the baseband signal through the poor cross-correlation with the mismatched filter. Sometimes, the transmitter is part of a communication system, where the emitter emits the phase modulated signal to an intended recipient.